<html>
<body>
<script src="ad_iframe_writer.js"></script>
<!-- Should be counted as same-origin even though it's about:contents. -->
<script>
  let adIframe = createAdIframe();
  // "incomplete_resource.js" should never be a complete resource load.
  adIframe.srcdoc = "<link rel='preload' href='incomplete_resource.js' as='script'>";
</script>

</body>
</html>
